Question: What was the population of Washington, D.C. at the start of 1860?
Paraphrase: What was the census of Washington, D.C. in the beginning of 1860?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q61 p:P1082 ?s . ?s ps:P1082 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'1860')) }